body {
    flex-direction: column;
}

header {
    display: flex;
    justify-content: space-around;
    width: 95%;
    height: 57px;
    margin: 0 auto;
    border-bottom: 1px solid #DDD;
    // padding: 0 22px 0 20px;

    .title {
        width: 84px;
        height: 22px;
        text-align: center;
        line-height: 22px;
        margin-top: 24px;
    }
}

main {
    flex: 1;
    overflow-y: scroll;
    width: 95%;
    margin: 0 auto;
    h5{
        height: 50px;
        line-height: 50px;
    }
    .new-course {
        width: 100%;
        height: 260px;
    }
    .course-content {
        width: 100%;
        height: 210px;
        border-radius: 15px;
        box-shadow: 0px 0px 8px 0px rgba(0, 0, 0, 0.4);
        overflow: hidden;
    }
    .course-img{
        height: 150px;
        overflow: hidden;
        img{
            width: 100%;
            height: 100%;
        }
    }
    .desc{
        margin-left: 16px;
        line-height: 22px;
    }
    .text{
        margin-left: 16px;
        font-size: 12px;
        color: #9A9A9A;
        line-height: 17px;
    }
    .course{
        width: 100%;
        a{
            color: #000;
        }
    }
    .content{
        position: relative;
        height: 140px;
        border-radius: 15px;
        margin-top: 15px;
        background-color: #E8E8E8;
        box-shadow: 0px 0px 8px 0px rgba(0, 0, 0, 0.4);
        .text{
            position: absolute;
            left: 10px;
            bottom: 30px;
            color: #ccc;
        }
        .desc{
            position: absolute;
            left: 10px;
            top: 50px;
        }
        img{
            width: 100%;
            height: 140px;
            border-radius: 15px;
        }
    }
}
.avtive{
    
    color: skyblue;
}